Engine automatic flame failure diagnosis

The diagnosis OBD2 Code Scanner of this type of failure, the first application of the shaking handle diesel engine crankshaft crank, found fault according to the fault appearance.
(1) diesel engine crankshaft rotation flexibility, but can not hear the sound of the injector fuel injection, you should check the diesel fuel tank has run out, and should add a little if you have run out of diesel, and the exclusion of the circuit in the air. If a diesel fuel tank, you should check the diesel filter, fuel tank switch is blocked, tubing or without cracking tube connected to the bolt is loose. Open circuit should check diesel moisture; should also check whether the fuel injection pump plunger stuck broken oil pump spring and delivery valve spring. Such as fuel supply is normal, may be the injection nozzles killed or injector spring break should remove the injector grinding glib or replace.
(2) flexible rotation, such as diesel engines, diesel engine crankshaft crank can hear the sound of the injector fuel injection supply system is working. Diesel engine compression good, you should check whether the rocker arm and rocker seat fracture, valve clearance adjustment screw is loose or broken valve push rod is off, these Car OBD2 Tools reasons can make the valve can not open caused the automatic shutdown of the diesel engine.
(3) If you do not open the decompression institutions can quickly crank diesel engine crankshaft, even a little sense of compression, you should remove the cylinder head cover, check whether the valve spring break, the air lock folder without loss, whether the broken valve . If these are normal, you should also check the piston is broken, the cylinder head gasket is damaged.
(4) If the pan is not moving diesel engine crankshaft should immediately check whether the cooling water tank, water box anhydrous, it must piston, cylinder liner stuck due to excessive thermal expansion. At this should allow the diesel engine to cool themselves. Not immediately add cooling water, otherwise it will Enthusiasm parts of diesel engine body, cylinder liner cracking and damage. The water inside the water, pull out the oil dipstick, check the sump oil level. When you pull out the oil dipstick, smoke a lot of heat, you should remove the body from the oil dipstick jack cover, check the rod bearings and main bearings due to poor lubrication caused by bush-burning axle accident. Bearing parts is quite dry, no oil drops, and obd2 software the temperature is very high, it is certainly occurs bush-burning axle accident. Remove the bearing, such as bearing alloy Lamao, available the doctor fine scraping bearing the nap parts, polished with fine emery cloth crankshaft journal, to identify bush-burning reason and troubleshooting after re-use; such as bearing alloy melting or peeling, and should be replaced with new pieces.
(5) If the body, water tank, the rear cover is broken, you should check the connecting rod bolt is broken, the upper and lower balance shaft with or without fracture.
(6) After the above checks, if the diesel engine working automatically shut down, you should check whether the supporting equipment to produce 自動車故障診断機 a malfunction diesel automatic shutdown.

Overhaul Mercedes motor vehicle not start out

2012 yearly digiprog 3 output of Mercedes-Benz A160 automobiles a mileage of about 30,000 km. Displays the proprietor: car or truck keys are unable to start off the car.
Pick-up: maintenance personnel check, found the motor vehicle flip the ignition switch, instrument lights usually are not lit, and could not hear the sound of the steering wheel to unlock the 15th power Unreachable.

Detection ignition digiprog 3 YANHUA switch manage unit, located no fault codes. Two essential perform tests, found that one particular in the a single broken. Next, the ignition switch control unit for driving authorization bootloader even now demonstrates one particular with the keys broken, so the license cannot carry on. Since the boot system is displayed as a key failure, then why one more vital will not get the job done it? Two keys at the same time the probability of damage is quite modest, consequently, relatively speaking, the better the chance on the ignition switch control unit failure.

Measured in accordance digiprog III to your circuit diagram ignition switch management unit end in the voltage from the energy supply and grounding are ordinary. It could seem most likely ignition switch manage unit failure.

Troubleshooting: replace the ignition switch management unit check, observed that two keys can successfully begin the vehicle, and all functions are standard.

Volkswagen Passat intermittent engine flameout

The super car ECU programmer mileage 100000km, equipped with AWL engine Shanghai Passat 1.8T sedan. Entrepreneurs reflect the vehicle in normal driving, the motor abruptly stalled. Failure to particular regulations, flameout consecutive commence right after many failed, about 30min and then start out the motor, you can get started correctly, in addition to a solution to plant failure.
For the failure in the electronically managed engine cannot get started, initially to produce utilization of the car detector test, coupled with aspects from the engine to work appropriately analyzed. "Suddenly switch off to search out the circuit, gradually flameout come across oil line upkeep encounter, motor on the usual procedure in the should have ample ignition electricity, fair air-fuel ratio, ignition timing and valve timing accurate. Also, verify the anti-theft process is in influence, anti-theft procedure operates, motor start out signals, but can not start.

First with KT600 detector diagnostic to ascertain the anti-theft system does not do the job. Then enter the engine process to read through the fault codes, three fault codes, respectively, to the fault code 17939 "camshaft timing adjustment disconnect standing is sporadic; fault code 17953" throttle manage malfunction, the state to the occasional " ; fault code 17925 main relay the J271 failure, condition sporadic. A few fault codes are sporadic, so apparent fault codes, connect the detector commissioning validation fault with the car or truck, driving around 1h motor instantly stalled, repeated 3 fault codes. Fault code accessibility upkeep information, coupled with the primary relay J271 circuit diagram evaluation, bring about motor flameout primary reason for the fault code 17925.

The motor regulate CMD CAN Flasher V1251 unit should be to command the operate of J271 throughout the control J271 eighty five feet Datie,. Main relay J271 four cylinders in the motor also controls the impartial energy offer on the ignition coil as well as camshaft timing on the electricity regulating valve. J271 within the motor compartment shielding, reference numeral thirty (Figure 1) determined by the servicing info to uncover. Any time a fault happens, transform the ignition switch, J271 action, ignition coil around the 1st foot calculated having a multimeter, voltage 4V, the voltage is simply too minimal; then measure the the J271 87 toes voltage is 4V, No. thirty ft 12V, regular; quite Naturally, the No. 87 feet and thirty toes are usually not wholly turned on. Unplug J271, open up relay shroud, identified the 30th the foot solder ablation (see Determine 2). The quick wiring connections J271 line of thirty toes with 87 foot line, start the engine, a sleek begin.

Replace the J271 motor is clean commence measuring the ignition coil No.1 ft voltage is 12V, commissioning, fault elimination.
Maintenance Summary
Later right after consulting learned how the probability of this failure where designs. Intermittent failure when ablation at the power of labor to get a period of time soon after the ablation position temperature increased, causing improved make contact with resistance, and fireplace ignition coil does not operate, the motor will stall, waiting for quite a while immediately after ablation place temperature is reduced, the engine may even have the capacity to operate appropriately.

The most critical car ECU programmer aspect of your fault in this case presented a fault phenomena connected together with the several fault details for the identical time, this example will not be unheard of from the true automobile breakdown routine maintenance. For this type of failure, we need to be the foundation of crystal clear failure phenomenon, fault details acquired to carry out in-depth, in depth investigation: the 1 hand, the evaluation which fault data can directly attributable to your failure phenomenon, which fault details and fault phenomenon there isn't any causal romance from which identifies one of the most possible induce in the malfunction; Alternatively, the analysis in the romantic relationship between the fault data to obtain a vital investigation of who's influenced individuals, who're impacted by, generally The impression is definitely the main reason leading to the failure. From the assessment in the two, when the conclusions with the assessment stage on the same fault data, then the knowledge would be the authentic trigger on the malfunction.

Analysis and overhaul of diesel engine operation abnormal failure

A Model 6135D-3 Car OBD2 Tools diesel engine found in diesel engine starter its idling ride, and airframe vibration and sound operation of mildly abnormal. Run 2 min, the diesel engine gradually increases the speed to 1000 r / min, the fuselage vibration is very serious, and the inertia oil bath air filter installed 1,2 cylinder at the mouth outward jet and a small amount of oil mist abnormal, diesel engine running sound.

Fault diagnosis: the above scenario, the presence of training instructors decisively ordered an emergency shutdown, an inspection of the diesel engine, found close to 5,6 cylinder intake manifold fever, but not hot close to 1,4 cylinder intake manifold; open the valve chamber cover, found 5 cylinder exhaust valve rocker adjustment screw loose, car diagnosis tool resulting in excessive valve clearance, and has more than valve lift; disassemble the cylinder head to check and found the five-cylinder piston top surface "ω"-shaped pits within area there is a small amount of diesel.

Failure Analysis and Troubleshooting: analysis based on the inspection results, the diesel engine failure due to the five-cylinder exhaust valve lock nut not tightened as the long-running loose, leading to the exit of the adjustment screw, the exhaust valve clearance gradually increases. Valve clearance over the valve lift, so that the exhaust valves of the cylinders is always in the closed state, resulting in the end of the car key programmer exhaust stroke, the cylinder pressure increases, the running resistance of the diesel engine increases, so the vibration occurs and running unstable, while also affect the normal combustion cylinder and work output. In the subsequent intake stroke, since the intake valve advance on the high temperature of the cylinder, the high pressure gas through the valve and the intake pipe is discharged from the air cleaner filter small amount of oil of the oil sump is brought out.

Re-adjust valve clearance in accordance with the provisions of torque locknuts supplemental oil and oil tanks to the air filter, diesel engine work to restore normal.

Work experience: OBD2 Code Scanner the diesel engine repairs and adjustments, be sure to methods and procedures in strict accordance with the instructions provided for the implementation of the operation to ensure that the diesel engine threaded locking device and reliable. Through this case, failure to exclude the author appreciate the correct operation and careful maintenance, maintenance personnel must master basic skills, is to avoid or reduce the failure to extend the service life of the diesel engine, and give full play to the basic guarantee of the effectiveness of such.

Know the 1997-2011 Ford Essential Programmer

Ford important programmer (1997-2011) will come out!!!
Recently, we new launch one unique important programmer for ford. What's the main functionality of this ford crucial programmer? Now we will present you with a common introduce.
Ford important programmer has superior efficiency. It is just a Computer system centered programming interface. You'll be able to utilize it to distinct keys and include new keys for various ford cars from 1997 to 2011 which belongs to OBD2 protocal.

Supported autos products for ford car key programmer:
Transit Hook up (2007-2011)
Focus (2004-2011) non-prox
Fusion (2002-2011)
C-Max (2003-2010)
Cougar (1998-2002)
Fiesta (1998-2002)
Fiesta (2002-2008)
Focus (1998-2004)
KA (1998-2000)
KA (2000-2008)
Mondeo (1998-2007)
Puma (1997-2001)
Transit (2000-2006)
Transit Connect (2002-2007)
Product link:

BMW E90 tire pressure monitoring system initialization method

BMW E90 sedan, each Car OBD2 Tools supplier correct tire inflation pressure to change a tire or wheel replacement, you must initialize the tire pressure monitoring system. Specific steps are as follows: 
    (1) to start the engine, but do not let the cars traveling;
    (2) repeatedly car key programmer pressing the rocker switch on the combination switch. Until the instrument cluster display "tire failure indicator initialization function;
    (3) short pressing the BC button combination switch, in order to confirm the contents of the display;
    (4) Press and hold the truck obd2 tool button for about Ss combination switch BC. Until the instrument cluster the RPA display lights, tire failure indicator is ready to initialize (Figure 2), without a small hook. Failure of tire pressure loss initialized;
    (5) Release the BC button obd2 コネクタon the combination switch initialization is complete.

Volkswagen Touran engine fault light lit

A mileage only 4600km, equipped car diagnosis tool shop with a 1.4L TSI direct injection engine, 5-speed manual transmission, 12-year Shanghai Volkswagen New Touran car. Reflects the owner the car engine failure in the process of moving lights lit.
Pick-up: First Volkswagen diagnostic instruments VAS 5051B vehicle engine control unit checks, there is fault code 00369 "fuel adjustment cylinder column 1 system too lean", the meaning of the failure code for a combustible mixture of gasoline and the operation of the engine work too thin. Input channel number 032, reads the data of the engine ECU on the adjustment of the combustible mixture of steam, and the display data is not within the normal range, and a large deviation (Figure 1).

Clear fault Car OBD2 Tools supplier  codes, the 32 sets of data automatically zero. Start the engine, the engine idle speed to low and operation jitter serious. Why clear fault codes, engine idling normal? The reason is clear fault codes, engine ECU fuel injection quantity correction, the value of learning and memory to zero, in accordance with the standard data injection. The mixed steam too dilute fault still exists, the engine idling is very unstable, and also shows the engine combustible mixed vapor partial thin indeed, the status of the combustible mixture of gasoline and oxygen sensor information passed to the engine ECU true expression, therefore, you can exclude the the possibility of failure of the oxygen sensor.

VAS 5051B to Auto Diagnostic Tool connect the road test, while observing the engine data stream gradually increased (Figure 2), 32 group 2 data load mixed steam parameters, test driving about 10km, engine malfunction light up again, failure code remains the same. The engine idle longer jitter.

After a comprehensive analysis of the above checks, resulting in: (1) low fuel pressure, caused by the fuel injection less engine hybrid vehicles in the process of moving steam too lean; ② fuel quality standards, add various stabilizers, anti-deflagration agent over more, resulting in the ECU in accordance with the amount of air entering the cylinder is injected into the corresponding component of the fuel, but there is a certain percentage of the material does not participate in the combustion, for example, 5 percent of other substances that do not participate in the combustion, the oxygen content of the exhaust gas is high, the engine ECU through the oxygen sensor detection value is still too dilute to determine the mixed steam; ③ injector clogging.

Based on the above OBD2 diagnostic tools analysis, inspect and repair the vehicle again, the first to use the low-pressure line pressure of the fuel pressure gauge measuring fuel supply system. Operation of the engine, the fuel low pressure the 0.65MPa (Figure 3), the engine stall maintain 10min after the low-pressure fuel pressure of 0.47MPa, the normal (Figure 4).

automotive air conditioning refrigerant leakage seven simple detection method(1)

Sensor
In summer, Auto Diagnostic Tool the refrigerant leakage is the most common use of air conditioning failure. Some refrigerant a year to add time, some might add two. The refrigerant leak is likely to cause environmental pollution, in addition to increasing the cost and time of the maintenance vehicle owners. Seven of automotive air conditioning leak detection method.

Automotive Car OBD2 Tools supplier air conditioning refrigerant leakage
Visual leak detection
Found somewhere in the system there are traces of oil, where possible leakage points. Visual leak detection is simple, there is no cost, but there is a great defect, unless OBD2 diagnostic tools China the system is suddenly fracture leakage point, and the system leak liquid colored media or visual leak detection can not locate, because usually very subtle leakage and automotive air conditioning could barely see a lot of parts.
  
Soapy water leak detection
Filled a 10-20kgcm2 pressure nitrogen to the system, coated with soap and water in various parts of the system, is bubbling at is the leakage point. This approach is currently the most common roadside repair shop leak detection methods, but the man's arm is limited, human vision is limited in ベンツ専用診断機 scope, often do not see the leak.